If In an AP ; a=-4 , an=29 and sn=150 find its common difference?
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comm en difference =========3
keshavanand10:
d is the common difference.
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put value of "a" and "an" in "Sn" formula in which "d" is not included and from here you got "n" and now put value of "n" in"an" formula
according to rules of a.p
no. I think that n=14
see
sn=150 an=29,a=-4 and n?,d?
n= 12
How ?
yes u are right
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